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All green, but equal? Morphological traits and ecological implications on spores of three species of mosses in the Brazilian Atlantic forest Anais da ABC (AABC)
MACIEL-SILVA,ADAÍSES S.; SILVA,FLÁVIA C.L. DA; VÁLIO,IVANY F.M..
Spores of the tropical mosses Pyrrhobryum spiniforme, Neckeropsis undulata and N. disticha were characterized regarding size, number per capsule and viability. Chemical substances were analyzed for P. spiniforme and N. undulata spores. Length of sporophyte seta (spore dispersal ability) was analyzed for P. spiniforme. Four to six colonies per species in each site (lowland and highland areas of an Atlantic Forest; Serra do Mar State Park, Brazil) were visited for the collection of capsules (2008 – 2009). Neckeropsis undulata in the highland area produced the largest spores (ca. 19 µm) with the highest viability. The smallest spores were found in N. disticha in the lowland (ca. 13 µm). Pyrrhobryum spiniforme produced more spores per capsule in the highland...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bryophytes; Histochemistry; Life histories; Spore size; Spore production; Tropical rain forest.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301249
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Litter accumulation and its effect on seedling recruitment in a Southeast Brazilian Tropical Forest Rev. Bras. Bot.
SANTOS,SANDY LIA DOS; VÁLIO,IVANY F.M..
Litter directly and indirectly affects germination and development of seedlings through physical and chemical effects, being an important factor in the determination of plant community. The monthly accumulation of litter was studied from November 1996 to September 1998 and its relation to climatic factors (such as rainfall, photoperiod and temperature). Also the litter effect on the recruitment of seedlings was observed in the Mata de Santa Genebra (22°49'45" S - 47°06'33" W). The correlation between litter accumulation and climatic factors was very weak. Under the canopy, the removal of the litter layer increased seedling emergence. Seedling mortality was very high, even in the rainy season. This can be due possibly by the low light intensity under the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Litter accumulation; Seedling recruitment; Climatic factors; Tropical forest.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000100011
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